Purple Team vs Red Team: Goals, Methods And Which Your Program Needs

A red team engagement is a covert exercise: offensive operators pursue a goal, such as reaching a payment system, while your defenders are not told, so you learn whether your organization detects and responds to a realistic attack. A purple team exercise is open and collaborative: attackers and defenders sit together, run techniques one at a time and fix detection gaps on the spot. Red teaming measures how ready you are. Purple teaming makes you more ready, faster. Most programs get more from purple teaming first and add covert red teaming once detection is reasonably mature.

This guide focuses on purple team vs red team: what each is for, how each is run, what you get at the end and how to pick the right one. If you are still deciding between red teaming and a standard pentest, start with our guide to red teaming vs penetration testing, which covers that comparison and the basic team roles.

The Short Version

Both exercises use the same offensive skills. What differs is who knows the test is happening and what success looks like.

• Red team: the defenders do not know. Success is measured by whether the operators reach their objective and whether the blue team noticed, how quickly and what they did about it.
• Purple team: everyone knows. Success is measured by how many attacker techniques the defenders can now detect or block that they could not before the exercise.

Purple Team vs Red Team: Side By Side

Factor	Red Team	Purple Team
Primary goal	Test real-world detection and response against a realistic adversary	Improve detection and prevention coverage technique by technique
Defender awareness	Blue team not told; only a small control group knows	Blue team participates openly
Pace	Slow and stealthy, often weeks	Fast iterations, often days
Path through the environment	One or a few realistic attack paths toward an objective	Many techniques tested in turn, often from a planned list
Feedback timing	After the engagement, at the debrief	Immediately, during each test
Typical output	Narrative of the attack, timeline of detections and misses, strategic recommendations	Technique-level results, new or tuned detection rules, ATT&CK coverage changes
Tests people and process	Yes, including escalation and incident response decisions	Mostly tools and analyst workflow
Realism	High	Lower, by design
Detection maturity needed	Moderate to high to get value	Useful at most levels
Main audience for results	Leadership, CISO, board	SOC, detection engineering, IT

How A Red Team Engagement Runs

A red team engagement starts with objectives and threat modeling: which adversary are we emulating and what would they want? The provider agrees rules of engagement with a small control group (often called the white team) that can pause the exercise if something goes wrong. Operators then gain access, which might involve phishing, an exposed service or a physical intrusion, establish persistence and move toward the objective while trying to stay hidden.

The defenders respond as they would to any real alert. At the end, the red team shares a timeline of every action, and the blue team compares it with what they saw. The gaps between the two timelines are the core finding. The result shows leadership not just whether controls exist but whether the organization as a whole, including people, escalation paths and incident response, works under pressure. See our list of top red teaming companies for providers.

How A Purple Team Exercise Runs

A purple team exercise usually starts with a test plan: a list of techniques, often drawn from MITRE ATT&CK and chosen to match threats relevant to your industry. For each technique the offensive side runs it, announces it, and the defenders check whether it was logged, whether an alert fired and whether the response was right. If it was missed, the two sides work on the logging source or detection rule, then run the technique again to confirm the fix.

Teams commonly use open source tooling to structure this work. Atomic Red Team is a library of tests mapped to the MITRE ATT&CK framework, which makes it easy to run small, repeatable techniques. VECTR is used to track red and blue team testing activities and measure detection and prevention across attack scenarios over time. Our explainer on what purple teaming is covers the format in more depth.

Purple teaming is also showing up in regulated testing. The European Central Bank’s TIBER-EU framework publishes guidance on how purple teaming is managed in the testing or closure phase of a threat-led test, a sign that collaboration after covert testing is becoming standard practice.

Common Purple Team Formats

Purple teaming is not one fixed exercise. Providers and internal teams tend to use a few recurring formats, and knowing them helps you scope the work.

• Technique-by-technique sessions. A planned list of ATT&CK techniques is run in order, with defenders validating each one live. This is the most common format and suits teams building coverage from a low base.
• Threat actor emulation. The test plan follows the known behavior of a specific group that targets your sector, so coverage work focuses on the techniques most likely to be used against you.
• Red team replay. After a covert engagement, the operators repeat their attack path step by step with defenders present, turning each missed action into a detection.
• Control validation sprints. Short, focused sessions after a new EDR rollout, SIEM migration or major logging change to confirm the new tooling sees what the old tooling saw.

How To Measure Results

The two exercises are judged by different numbers, and mixing them up leads to disappointment.

For a red team engagement, useful measures include whether the objective was reached, time to first detection, time from detection to escalation, time to containment, and which stages of the attack were never seen. These describe organizational readiness, and they are most meaningful when compared across engagements over time.

For a purple team exercise, useful measures include the number of techniques tested, the share that were logged, alerted on and blocked, the number of new or tuned detections delivered, and the change in ATT&CK coverage from the start of the exercise to the end. These describe defensive capability, and they give detection engineers a clear list of what to build next.

What Each Is Good For

Red Teaming Answers “Would We Catch It?”

Red teaming is the only way to see how your organization behaves when it does not know it is being tested. That includes whether an analyst escalates a strange alert at 2 a.m., whether help desk staff reset a password on a convincing phone call, and whether incident responders contain the right systems. It produces strong evidence for leadership and regulators about real readiness.

Purple Teaming Answers “Can We See This Technique Now?”

Purple teaming turns offensive knowledge directly into defensive improvements. Instead of a report recommending better detection of credential dumping, you leave the session with a working detection for it, tested and confirmed. It builds skills on both sides and gives detection engineers a clear backlog.

Where Each Falls Short

A covert red team against an organization with weak logging often ends with a predictable result: the operators reach the objective and nobody noticed. That is useful once, but expensive to learn repeatedly. Purple teaming, on the other hand, cannot tell you how your people respond to a surprise, because everyone knows the test is happening.

[EXPERT QUOTE: White Knight Labs, John Stigerwalt, on how to tell whether an organization is ready for a covert red team or should start with purple team exercises, and what the first red team usually reveals]

Which Your Program Needs

Start With Purple Teaming If

• You have a SOC or managed detection provider but no data on which attacker techniques you actually detect.
• Your last pentest or red team showed attackers moving freely without alerts.
• You recently deployed or changed an EDR, SIEM or logging pipeline and want to confirm it works.
• You want to grow internal detection engineering skills.

Move To Red Teaming If

• You have measured and improved detection coverage and want to test it under realistic conditions.
• Leadership or a regulator wants evidence of real-world readiness, including people and process.
• You want to test incident response, escalation and decision-making, not just tools.
• You face a specific, capable threat actor and want to know how far they would get.

Run Them As A Cycle

Many mature programs alternate: a covert red team engagement reveals gaps, a purple team replay of the same attack path fixes them, and the next red team tests whether the fixes hold. Between those, regular purple team sessions and continuous tools such as breach and attack simulation keep detection coverage from drifting.

Questions To Ask A Provider

• Red team: How do you choose which adversary to emulate? Who is on the control group and how do you deconflict with real incidents? Is social engineering or physical access in scope? Do you offer a purple team replay after the engagement?
• Purple team: How do you choose techniques for the test plan? Will you help write or tune detection rules, or only report misses? How do you track coverage over time? Can sessions be run remotely with our SOC provider?
• Both: Who are the operators and what experience do they have? Our list of top red team training providers shows where many practitioners train.

For providers that specialize in collaborative work, see our list of top purple teaming providers.

Frequently Asked Questions

Is Purple Teaming A Separate Team?

Usually not. Purple teaming is a way of working where red team operators and blue team defenders collaborate. Some organizations assign a coordinator role, but the exercise relies on both existing teams.

Is Purple Teaming Cheaper Than Red Teaming?

Often, because exercises are shorter, need less covert planning and can focus on a set list of techniques. Costs still depend on scope, duration and the seniority of the operators involved.

Can A Purple Team Exercise Follow A Red Team Engagement?

Yes, and it is one of the most valuable ways to use one. Replaying the red team’s attack path with defenders present turns each missed step into a tested detection.

Do Small Organizations Need A Red Team?

Most do not need one early on. A regular pentest, basic detection coverage and purple team sessions usually deliver more value until detection and response are mature enough to make a covert test informative.

Conclusion

Red teaming and purple teaming use the same attacker skills for different purposes. A red team tests whether your organization would catch and stop a realistic adversary. A purple team improves your ability to do that, one technique at a time. Use purple teaming to build detection coverage and red teaming to prove it holds when nobody knows the test is coming.

Read our comparison of red teaming vs penetration testing, compare top red teaming companies and purple teaming providers, or browse every guide and list in our penetration testing hub.